Valve-control mechanism



E. G. SMITH. VALVE CONTROL MECHANISM. APPLICATION FILED SEPT. 19, I919.

Patented July 20, 1920.

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E; G. SMHH. VALVE comm MECHANISM.

I, I APPLICATION lLED SEPT. 19. I919. 1,347,300. Patented July 20, 192

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UNITED STATES! EARL G. SMITH, OFYCRANDON, WISCONSIN.

Specification of Letters Patent.

jVALVE-CONTROL MECHANISM.

Patented July 20, 192-0.

Application filed September 19, 1919. Serial No. 324,746.

To all whom it may concern:

Be it known that I, EARL G. SMITH, a citi zen of the UnitedStates,;residing at Crandon, in the county of Forest, State ofWisconsin, have invented a new and useful Valve-Control Mechanism andI'do hereby declare the following to bea full, clear, and exactdescription of the invention, such as will enable others skilled in theart to'which it appertains to make and use the'same. I The inventionrelates to valve control mechanism for internal combustion enginesand'has for its object to provide cam means for operating a lever whichlever controls the exhaust and ignition so that said engine may beoperated to the right or to the left.

A further object is to provide a valve and ignition control lever whichmay beshifted from one cam to another thereby reversing the engine. Alsoto. provide gear means operative by the crank shaft for revolving thecam, thereby operating the control lever.

A further object is to provide thecontrol lever with a pivoted memberhaving on its free end a roller adapted to be rotated by the cams andprevent friction between the cams and the lever andto provide a pivotedlever for actuating the shifting from onecain to the other. 7 v a vlVith the above and other objects in view the invention resides inv thecombination and arrangement of parts as hereinafter set forth,shown inthe drawings, described and claimed,"it being understood that changes inthe precise embodiment of the invention may be made Within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a side elevation of the valve controllingmechanism.

Fig. 2 is a plan view of a portion of the cam gear and the end of thepivoted lever,

' parts being broken away to better show the structure.

Fig. 3 is a detail view of the cam gear.

Fig. 4 is a vertical sectional view through the cam gear.

Referring to the drawings, the numeral 1 designates a fly wheel carriedby a crank shaft 2 of an internal combustion engine and 3 a cam gearwhich meshes with a gear 4 secured to the crank shaft 2. Cam gear 3 isrotatably V mounted in a bearing 5 of a bracket 6 which may be securedto the en- 7 gine base or to any other suitable support.

The outer face of the cam gear 3 is provided with cams 7 and 8 which arepreferably formed integral with the cam gear and with each other. Cams?and Sare at right angles to each other and their longitudinal axis beingat about 90 degrees from eachother. Cam 7 is the cam which normallyoperates the valve and ignition spark, that is, when the engine isturning to the right and cam 8 isthe cam which isutilized for operatingthe exhaust valve and ignition spark whenthe engine is turning to theleft. Slidably mounted in a bearingv 9 which may be carried bythe enginecasing or supported in any other manner isa valve rod 10, which controlsthe exhaust valve of the engine, said valve rod also having pivotallyconnected thereto as at 11, a rod 12, which controls the spark. Thelower end of the lever 10 has pivoted thereto as at 13 a lever 14, whichlever 14% is provided with a roller 15 on its lower ends, said rollerbeing adapted to engage the camming surfaces of the cams 7 and 8 therebyoperating the exhaust valve andthe ignition spark. lVhen the roller 15is in engagement with the cam 7, the

valvero d 1 and rod 12 which controls the ignitionspark will so operateas to work the spark'and exhaust valve so that the engine will turn tothe right. When it is desired to reverse the engine, that is cause thesame to turn to the left, pivoted lever 14 is shifted laterally untiltheroller 15 engages the camming surface of the cam 8 thereby changingtheposition of the valve rod 10 and ignition rod 12, so that the cam 8as it revolves in the opposite direction will cause the engine to turnto the left. It is to be understood that the type-of engine to which themechanism is applied has an automatically controlled intake valve. Theshifting of the pivoted lever 14 is done by a lever 16, the lower end ofwhich is pivoted as at 17 to a bracket 18 carried by the engine base orin any other suitable position. Lever 16 is provided with a yoke 19,which engages the pivoted lever 22 in a segment 23carried by the bracket18.

Detent 20, when it is desired to shift the roller 15 to the cam 8, israised and the lever 16 moved outwardly until the detent 20 drops intoengagement with the'notch 24 of the segment 23 thereby securely holdingthe :roller in proper alinement with the earn; 8.

Valve rod is normally under tension of a spring 25, which springwill'causet'heroller to remain in engagement with the cams 7 and 8 sothat said roller will normally follow the camming surfaces of the cam.

However, spring maybe located in any other convenient location, or whenthe exhaust rod 10 is connected directly to the ex hau'st valve whichexhaust valve is normally closed by a valve spring,the spring 25 may beeliminatedand the valve spring utilized for "maintaining the roller 15in engagement with the cams 7 and 8.

Bearing 9 is a loose bearing and trans.-

I versely is of considerably greater width than the width of the pushrod so that the movement of the pivoted lever 14: from one cam to theother may be accomplished.

From the above it will be seen thatia shift ing mechanism is providedwhereby the reversing of the engine may be accomplished quickly and onewherein cams are utilized for operating the exhaust and ignition whening to the left.

one of said cams being adapted to operate the valve and ignition controlrods for turning the engine'to the right, the other cam being adaptedtooperate the exhaust valve control rod and the ignition control rod so asto operate the enginetothe left and means whereby the operating valverodmay be shiftedfromone cam tothe other. i p reversing mechanism forinternal combustion-engines comprising an exhaust control rod'and anignition control rod connectedthereto, said exhaust controlrod be,- ingslidable in a'bearin'g, the lower end of said exhaust control rodhavinga lever :pi'v

oted thereto, .a cam gear meshing with a gear 5 on the crank shaft, saidcam gear being pm vided withf'a" pair of 'cams, one of said cams beingadapted to reciprocate the exturnrto the right, the other cam beingadapted to operate-the exhaust valve control rod so that the engine willturn tothe left, a lever connected to the pivoted lever Where by the endof pivoted lever 'may be moved from engagement with one of the cams andinto engagementv with -the other and. m n wh reby the pivoted le el? maybe locked inengagementfavith either of" the CYZ II S- 7 3 A reversingmechanism for internal combustion engines comprising exhaustcontrolfrod-and' anignition control rod eonne tcd t ere o, sa dxhaustfcontr l r d eing slidable in a transversely enlarged bear-jing',the lower endof said exhaust; control rod having a lev r pivot dher og ic gear me h ng Wit a gear on h c k h ft of the engine, said camgear being provided with a pair of camsat 90 degrees from each 'haustcontrol rod-so that the engine will other, one of said cams beingadapted to re- 7 ciprocate the exhaust control rod and'its ig nit' oncontrol rod for operat ng the engine so that its crank will turntowardthe right,

thebth ricam eingatl p e d t p t i 7 rod so that the engine willturn tothe left,

the pivoted lever having its 'low'enencl a roller adaptedfto be placedin engagement Vwiththe cams'of the cam gear, a transversely pivotedlever connectedto the pivoted lever,

said transversely "pivotedfllever' forming vvalve control rod [and the@ignition control meanswhe're'by the'pivoted' lever may be j shiftedfrom one cam face to theothe'r and detent means carried bythetransversely pivoted leverwhereby said'lever may be locked sothatroller. at theend oflthe pivotedleveri may be locked intoengagement'with the cam faces; V

. "'l I In testimony LWheIQOfIf have signed my nametofthisfs'pocification in the two subscribing witnesses.

WVitnessesi V vj 1 "FRANK S -roaming"; H. H. B-INcnAi'n x presence of

